At design-time, I've set in ObjectInspector:
IEFolderMView1.Folder to the path of a folder containing a few SVG images
IEFolderMView1.Filter = *.SVG
IEFolderMView1.FileTypes = iefCustom
IEFolderMView1.FileTypesMask = *.SVG
Vcl.Skia was added to the uses list.
But the ObjectInspector settings were overridden by:
IEFolderMView1.Folder := IEFolderTree1.Folder;
Now, it works when commenting out that line.
What amazes (and delights) me is that it even works when a ZIP file is specified as TImageEnFolderMView.Folder. Is this standard behavior, or does a specific setting on my system possibly cause that?